Manufacturing alcohol from sulfite liquor.



P. e. EKsTRbm. MANUFACTURING ALCOHOL PRO! SU LIITB LIQUOR. APPLICATIONFILED PER, 1912.

1,050,723. I Patented Jan.14,1913.,

ll TK/ r U I Z a quantity thereof of 100 gr. may be taken.

for each cubicmeter of liquor. If it is desired at the same time toneutralize the liquor, a suitable quantlty of a neutralizing agent, forinstance lime mud or powdered lime-stone, is added. Thereupon the cock 7is opened, so that compressed air flows from the pipe t through thenozzle 3 into the liquor in the receptacle 1. The air effects a violentstirring of the liquor and by the action of the catalyzer a rapidoxidation of the easy oxidizable compounds that are contained in theliquor is formed in the neutralizing process: If the quantity of liquortreated is 100 to 200 cubic meters the neutralizing and oxidizingprocesses generally finished after a period of about three hours. Forthe action ofthe catalyzer, it of no importance if theneutralization isaccomplished at the same time as the treat ment by means of catalyzer orbefore or after said treatment. The neutralizing agent employed coac'ts,with the catalyzer and aeration in such a manner that it new ""alizes acl or acid compounds which are med in the liquor by the 'oXiJ- place inthe aeration and st be made uninjurious before the be fermented. Whenthe treat- ,ne receptacle 1 has been finished, ;r is left in thereceptacle 1 until no id matters contained therein have d, and it isthen drawn off ghon 10 and the pipe 12 to the t 1. being subjected to asecond [an while tl wing down through the fine cm-rents at the same timeair through the tower in opposite dit on. The second aeration should becarried out at a temperature of to C. anddining the same a mechanicalabsorptionv of oxygen from the air takes place. If necessary the liquormay pass a cooling :tzp )aratus, (not shown in the drawing) before it issupplied to the towers 13 for cooling it to the desired temperature.Generally the cooling may, however, be accomplished in. the towers 13 bymeans of the air used for the second aeration After aeration in on: ormhre towers 13 or similar apparatus liquor is ready to be fermented andmay v11 oii directly to the fermentation out in a receptacle of the sameconstruction as the receptacle 1. If the liquor has been cooledpreviously to such a temperature that it can absorb oxygen mechanically,the aeration may be accomplished in one step. Eventually the secondaeration may be carried out in the fern'ientation reservoirs, while thefermenting'process is going on, as is customary in fermenting othersaccharine liquids.

I claim;

1. The method of treating the sulfitc liquor from the sulfite pulp as apreparatory step to the manufacture of alcohol by fermenting thesaccharine matters contained therein, which consists in adding acatalyzer for oxidation to the liquor before the fermentation process iscarried out, and acrating the liquor, substantially as and for thepurpose setforth.

2, Method of treating the sulfite liquor from suliitc pulp asapreparatory step to the manufactm'e of alcohol by fermenting thesaccharine matters contained therein, which consisis in adding acatalyze! for oxidation and a base to the liquor before the fermentationprocess is carried. out, and aerating the liquor, substantially as andfor the purpose set forth.

3. Method of treating the sulfite liquor from sulfite pulp as apreparatory step to the manufacture of alcohol. by fermenting thesaccharine matters contained therein, which consists in adding acatalyzer for oxidation, aerating the liquor while in a hot state,coolin the li uor and again aerating the same, su stantia ly as and forthe purpose set forth.

4. Method of treating the sulfite liquo from sulfite pulp as apreparatory step to the manufacture of alcohol by fermenting thesaccharine 'matters contained therein which consists in adding acatalyzer for oxidation and a base to the liquor, aerating the liquorwhile in a hot state, separating the liquor from the solid matterscontained therein, cooling the liquor, and again aerating the same,substantially as andvfor the purpose set forth.

In testimony that I claim' the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

PER GosTA EKsTRoM.

Witnesses:

CARL DELMAJ, J OHN DELMAR.

attained. for five cents each, by addressing the Commissioner of latent,

Washington, D. c."

